Fix a corrupted excel file

I am in need of a freelancer to fix a corrupted Excel worksheet file. The file is not password-protected or encrypted. It is a high priority job and needs to be fixed ASAP.

Ideal Skills and Experience:
- Proficient in Excel and experienced in fixing corrupted files
- Familiarity with different types of Excel files
- Attention to detail and ability to work quickly under pressure
- Excellent communication skills to provide updates on progress